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 entire and fragmentary three- and four-rayed spicules. Drawn from a trans- 

 parent section. 



Fig. 8. Elasmocaelia Mantelli, Hinde. Natural size. From the Lower Green Sand at 



Farringdon 177 



Figs. 9, 9 a. Corynella foraminosa, GoML sp. Natural size. From the Lower Green Sand 



at Farringdon 181 



Fig. 9 b. The same. A portion of the fibre, enlarged seventy-two times, showing the filiform 

 three-rayed spicules. The minute basal ray of these spicules is rarely shown in 

 section. The interspaces between the fibres are filled with crystalline calcite. 

 Drawn from a transparent section. 



Figs. 10, 10 a. Corynella rugosa, Hinde. Three-rayed spicules of the fibre. Enlarged two 

 hundred times. 10 a represents a fragment of the fibre composed of a bundle 

 of spicules naturally associated together. From the Upper Green Sand at 

 Warminster, Wiltshire 182 



Fig. 11. Corynella socialis, Hinde. Natural size. From the Upper Green Sand at 



Warminster 183 



Fig. 11a. The same. A portion of the fibre, enlarged seventy-two times, showing sections 

 of filiform three-rayed spicules similar to those of C. rugosa. Drawn from a 

 transparent section. 



